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开发学院软件开发Java java读取配置文件properties的方法 阅读

java读取配置文件properties的方法

 2013-03-24 09:09:39 来源:WEB开发网 闂傚倸鍊风欢姘缚瑜嶈灋闁圭虎鍠栫粻顖炴煥閻曞倹瀚�闂傚倸鍊风粈渚€骞夐敓鐘插瀭闁汇垹鐏氬畷鏌ユ煙閹殿喖顣奸柛搴$У閵囧嫰骞掗幋婵冨亾閻㈢ǹ纾婚柟鐐灱濡插牊绻涢崱妤冃℃繛宀婁簽缁辨捇宕掑鎵佹瀸闂佺懓鍤栭幏锟�濠电姷鏁告慨顓㈠箯閸愵喖宸濇い鎾寸箘閹规洟姊绘笟鈧ḿ褍煤閵堝悿娲Ω閳轰胶鍔﹀銈嗗笂閼冲爼鍩婇弴銏$厪闁搞儮鏅涙禒褏绱掓潏鈺佷槐闁轰焦鎹囬弫鎾绘晸閿燂拷闂傚倸鍊风欢姘缚瑜嶈灋闁圭虎鍠栫粻顖炴煥閻曞倹瀚�  闂傚倸鍊烽懗鑸电仚缂備胶绮〃鍛村煝瀹ュ鍗抽柕蹇曞У閻庮剟姊虹紒妯哄闁圭⒈鍋嗛惀顏囶樄闁哄本娲樼换婵婄疀閺囩姷鐛ラ梻浣哄帶婢瑰﹥绂嶅⿰鍫氣偓鏃堝礃椤忎礁浜鹃柨婵嗛婢ь喖霉閻樻瑥瀚粻楣冩煕椤愩倕鏋庨柣蹇嬪劜閵囧嫰寮村Ο鍝勫Е濡炪們鍨洪悷鈺呭箖閳╁啯鍎熼柕鍥у簻閹凤拷
核心提示: 示例:属性文件:beans.propertiesarticleDao=cn.com.leadfar.cms.backend.dao.impl.ArticleDaoImplchannelDao=cn.com.leadfar.cms.backend.dao.impl.ChannelDaoImpl使用此属性时类的配置如下:

 示例:
属性文件:beans.properties

articleDao=cn.com.leadfar.cms.backend.dao.impl.ArticleDaoImpl
channelDao=cn.com.leadfar.cms.backend.dao.impl.ChannelDaoImpl
使用此属性时类的配置如下:
PropertiesBeanFactory.java

package cn.com.leadfar.cms.utils;

import java.io.IOException;
import java.util.Properties;

import cn.com.leadfar.cms.backend.dao.ArticleDao;
import cn.com.leadfar.cms.backend.dao.ChannelDao;

public class PropertiesBeanFactory implements BeanFactory {
	Properties props = new Properties();
	public PropertiesBeanFactory(){
		//读取配置文件,得到具体DAO的实现类名
		try {
			props.load(Thread.currentThread().getContextClassLoader().getResourceAsStream("beans.properties"));
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	
	public ArticleDao getArticleDao() {
		
		String className = props.getProperty("articleDao");
		
		try {
			Class clz = Class.forName(className);
			return (ArticleDao)clz.newInstance();
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		} catch (InstantiationException e) {
			e.printStackTrace();
		} catch (IllegalAccessException e) {
			e.printStackTrace();
		}
		return null;
	}

	public ChannelDao getChannelDao() {
		String className = props.getProperty("channelDao");
		
		try {
			Class clz = Class.forName(className);
			return (ChannelDao)clz.newInstance();
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		} catch (InstantiationException e) {
			e.printStackTrace();
		} catch (IllegalAccessException e) {
			e.printStackTrace();
		}
		return null;
	}

}

Tags:java 读取 配置

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